My Employment Authorization Card is for 3 years, yet I was told I don't have to return it.

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My Employment Aithorization Card was valid from 01/22/15 and it expires 01/21/18. it's 3 years yet I been to immigration and have told and was told I shouldn't worry about it. Since it was sent to me before February 16. My question is its still 3 years? I don't know what to do, I don't want to have any problems but I don't know who else to ask.

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Answered 1 year 5 months ago